IDY10220 SECURITE High Seas Forecast for Western METAREA 10 12S TO 30S BETWEEN 90E AND 125E, AND 30S TO 50S BETWEEN 80E AND 129E Issued by the Australian Government Bureau of Meteorology For 24 hours commencing 1100 UTC 29 April 2026 Part 1 Warnings Refer to latest warnings for boundary of affected area and type of weather system. Melbourne Gale Warning 9. Part 2 Situation at 290600 UTC Trough [1] 30S084E 33S090E. Forecast trough [1] near 30S081E 36S086E at 301200UTC. Trough [2] 42S095E 50S103E. Forecast trough [2] near 36S108E 43S122E at 301200UTC. Forecast cold front entering from the west near 47S061E 50S065E at 291200UTC and then near 48S070E 50S077E at 301200UTC Part 3 Forecast Refer to latest warnings for details of the area affected. North of line 33S080E 37S082E 34S095E, outside warning areas: Southeasterly quarter winds. Wind speeds 20/30 knots. Rough seas. Moderate swell. South of line 42S080E 46S090E 42S094E 33S113E 34S121E 46S129E, outside warning areas: Westerly quarter winds, shifting northwesterly quarter east of front [1] and shifting southwesterly quarter within 480nm west of trough [2]. Wind speeds 20/33 knots, Rough to very rough seas. Moderate to heavy swell. Remainder: Winds not exceeding 25 knots. Slight to moderate seas. Low to moderate swell, increasing to heavy south of line 45S089E 43S091E 42S094E. Rain areas, scattered showers and isolated thunderstorms mostly within 240nm of front, troughs. Heavy at times within 60nm of trough [1]. Visibility reducing below 2nm in precipitation. Please be aware Wind and wave forecasts are averages. Wind gusts can be 40 per cent stronger than the forecast, and stronger still in squalls and thunderstorms. Maximum waves can be twice the forecast height. WEATHER MELBOURNE The next routine forecast will be issued at 21:00 UTC Wednesday.